/***********************************************************************************************************************
*                                                                                                                      *
* libscopeprotocols                                                                                                    *
*                                                                                                                      *
* Copyright (c) 2012-2022 Andrew D. Zonenberg and contributors                                                         *
* All rights reserved.                                                                                                 *
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* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the     *
* following conditions are met:                                                                                        *
*                                                                                                                      *
*    * Redistributions of source code must retain the above copyright notice, this list of conditions, and the         *
*      following disclaimer.                                                                                           *
*                                                                                                                      *
*    * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the       *
*      following disclaimer in the documentation and/or other materials provided with the distribution.                *
*                                                                                                                      *
*    * Neither the name of the author nor the names of any contributors may be used to endorse or promote products     *
*      derived from this software without specific prior written permission.                                           *
*                                                                                                                      *
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED   *
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* POSSIBILITY OF SUCH DAMAGE.                                                                                          *
*                                                                                                                      *
***********************************************************************************************************************/

#version 430
#pragma shader_stage(compute)

layout(std430, binding=0) restrict buffer buf_data
{
	float data[];
};

layout(std430, binding=1) restrict readonly buffer buf_sines
{
	float sines[];
};

layout(std430, binding=2) restrict readonly buffer buf_cosines
{
	float cosines[];
};

layout(std430, push_constant) uniform constants
{
	uint len;
};

layout(local_size_x=64, local_size_y=1, local_size_z=1) in;

void main()
{
	//If off end of array, stop
	if(gl_GlobalInvocationID.x >= len)
		return;

	//Sin/cos values from rotation matrix
	float sinval = sines[gl_GlobalInvocationID.x];
	float cosval = cosines[gl_GlobalInvocationID.x];

	//Uncorrected complex value
	float real_orig = data[gl_GlobalInvocationID.x*2 + 0];
	float imag_orig = data[gl_GlobalInvocationID.x*2 + 1];

	//Apply the matrix and write back (in place)
	data[gl_GlobalInvocationID.x*2 + 0] = real_orig*cosval - imag_orig*sinval;
	data[gl_GlobalInvocationID.x*2 + 1] = real_orig*sinval + imag_orig*cosval;
}
